must grub
Verbe régulier : grub - grubbed- grubbed
Traduction française : fouir - fouiller 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must grub
you must grub
she must grub
we must grub
you must grub
they must grub 	I must be grubbing
you must be grubbing
she must be grubbing
we must be grubbing
you must be grubbing
they must be grubbing	I must have grubbed
you must have grubbed
she must have grubbed
we must have grubbed
you must have grubbed
they must have grubbed	I must have been grubbing
you must have been grubbing
she must have been grubbing
we must have been grubbing
you must have been grubbing
they must have been grubbing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't grub
you mustn't grub
she mustn't grub
we mustn't grub
you mustn't grub
they mustn't grub 	I mustn't be grubbing
you mustn't be grubbing
she mustn't be grubbing
we mustn't be grubbing
you mustn't be grubbing
they mustn't be grubbing	I mustn't have grubbed
you mustn't have grubbed
she mustn't have grubbed
we mustn't have grubbed
you mustn't have grubbed
they mustn't have grubbed	I mustn't have been grubbing
you mustn't have been grubbing
she mustn't have been grubbing
we mustn't have been grubbing
you mustn't have been grubbing
they mustn't have been grubbing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I grub?
must you grub?
must she grub?
must we grub?
must you grub?
must they grub? 	must I be grubbing?
must you be grubbing?
must she be grubbing?
must we be grubbing?
must you be grubbing?
must they be grubbing? 	must I have grubbed?
must you have grubbed?
must she have grubbed?
must we have grubbed?
must you have grubbed?
must they have grubbed? 	must I have been grubbing?
must you have been grubbing?
must she have been grubbing?
must we have been grubbing?
must you have been grubbing?
must they have been grubbing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I grub?
mustn't you grub?
mustn't she grub?
mustn't we grub?
mustn't you grub?
mustn't they grub? 	mustn't I be grubbing?
mustn't you be grubbing?
mustn't she be grubbing?
mustn't we be grubbing?
mustn't you be grubbing?
mustn't they be grubbing? 	mustn't I have grubbed?
mustn't you have grubbed?
mustn't she have grubbed?
mustn't we have grubbed?
mustn't you have grubbed?
mustn't they have grubbed? 	mustn't I have been grubbing?
mustn't you have been grubbing?
mustn't she have been grubbing?
mustn't we have been grubbing?
mustn't you have been grubbing?
mustn't they have been grubbing?